You can use Powerpoint for example:

thank you so much Anastasia Shamustakimova

Looks to me like it was make by hand in an illustration program (Powerpoint, Illustrator, etc.).

If you want to publish, make sure the font size & resolution can be changed to the publisher's specifications (and keep the original figure file!). I've had to redo more than one figure when the original was lost/only a .pdf/etc.

Hi, as has been already suggested, any graphics software should do it.

If you want to be more precise (with the position of the primers etc), you could use SnapGene (there is free trial available) and then adjust it in any graphics software to your liking.